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When he bought the toy in 1983, Yuri Andropov was leader of the Soviet Union, breakfast TV was a novelty and music CDs were in the shops for the first time.

Finally done: Graham Parker with his cube

‘I cannot tell you what a relief it was to finally solve it,’ the 45-year-old from Portchester, Hampshire, said. ‘It has driven me mad over the years – it felt like it had taken over my life.

‘I have missed important events to stay in and solve it and I would lie awake at night thinking about it.

‘I have had wrist and back problems from spending hours on it but it was all worth it. When I clicked that last bit into place and each face was a solid colour, I wept.’

Wife Jean, 47, said it had felt like there had been three people in their marriage.

‘When I met Graham, he was already obsessed with the cube – spending hours on it every day,’ she said. ‘I have often thought about getting rid of it but I knew he would not rest until he had solved it.’

A spokesman for the governing body for competitions involving the puzzle, the World Cube Association, said it was ‘definitely the longest it has taken’ to finish the cube.